(中北大學 材料科學與工程學院，太原 030051)
摘 要: 采用高能行星球磨機制備不同Er含量的Al-Ti-B復合粉末細化劑，并利用XRD、SEM和定量金相技術對Al-Ti5-B1-Er復合粉末細化再生3104鋁合金組織的效果進行研究。結果表明：Al-Ti5-B1-Er復合粉末細化劑預制塊在700 ℃下保溫30 min后，組織為Al3Ti、Al3Er、TiB2和Ti2Al20Er。隨著Al-Ti5-B1-Er復合粉末細化劑中Er含量的增加，再生3104鋁合金晶粒顯著細化，晶粒由粗大枝晶逐漸等軸化。同商業(yè)Al-Ti5-B1中間合金細化劑相比，經(jīng)Al-Ti5-B1-Er復合粉末細化劑細化的再生3104鋁合金細化響應快于 Al-Ti5-B1中間合金的；且Al-Ti-B-Er復合粉末預制塊細化劑在細化30 min時達到最佳效果，晶粒尺寸(159±59) μm，比Al-Ti-B中間合金細化最優(yōu)值提高45%。
關鍵字: 再生3104鋁合金；稀土Er；AlTi5B1；細化劑
（School of Materials Science and Engineering, North University of China, Taiyuan 030051, China）
Abstract:Al-Ti-B composite powders with different Er contents were prepared by high energy planetary mill, the effect of refining of Al-Ti5-B1-Er composite powders on recycled 3104 alloy was studied. The results show that the microstructures of the sintered Al-Ti5-B1-Er composite powder preform are mainly composed of Al3Ti, Al3Er, TiB2 and Ti2Al20Er phases. With the increase of Er in the Al-Ti5-B1-Er composite powder, the grain size of the 3104 aluminum alloy is significantly refined, and the grain is gradually changed from the coarse dendrite to the equiax. Compared with the commercial Al-Ti5-B1 master alloy, Al-Ti5-B1-Er composite powders refiner has much faster refining effect on recycled 3104 alloy, which gains the minimum grain size (159±59) μm after melt treatment 30 min.
Key words: recycled 3104 alloy; rare earth Er; AlTi5B1; refiner
